I received an email from Phyl Durdey, the Director of Training at Flightline Training Services asking to use an image of mine in their yearly calender given to customers. I am wondering what proper "sales etiquette" is and whether or not it is right for me to profit off of this. In the email, no money was mentioned which brings me to believe that I should just give the OK and ask for the calender to be sent to me.